172 citations · 863 across the 42 of their papers we have counts for
12 papers · 1 filter
Lattice QCD constraints on pion electroproduction off a nucleon
Yu Zhuge, Zhan-Wei Liu, Derek B. Leinweber +1
Very recently, a lattice QCD collaboration has explored threshold pion electroproduction near the physical pion mass and has simulated the relevant multipole amplitudes. Different…
Pion photoproduction of nucleon excited states with Hamiltonian effective field theory
Yu Zhuge, Dan Guo, Zhan-Wei Liu +2
Over the past few years, Hamiltonian effective field theory has been successfully applied to studies of nucleon and hyperon excited states. By discretizing the Hamiltonian in a fin…
Structure of the with Hamiltonian Effective Field Theory
Fang-Chao Han, Zhan-Wei Liu, Derek B. Leinweber +1
We investigate the internal structure of the by analyzing lattice QCD simulation and experimental data within Hamiltonian effective field theory, considering both $J^P…
Nucleon resonance structure to 2 GeV and the nature of the Roper
Shiryo Owa, Derek B. Leinweber, Anthony W. Thomas
The study of the spectrum of excited states of the nucleon is vital to our understanding of how QCD is realized in the baryon spectrum. Using a simultaneous analysis of the pion nu…
Pion photoproduction of nucleon excited states with Hamiltonian effective field theory
Yu Zhuge, Zhan-Wei Liu, Derek B. Leinweber +1
We refine our previous calculation of multipole amplitude for pion photoproduction process, . The treatment of final-state interactions is based upon an e…
Understanding the nature of the resonance
Liam Hockley, Curtis Abell, Derek Leinweber +1
We present a coupled-channel analysis of the -baryon spectrum, based in the framework of Hamiltonian Effective Field Theory (HEFT). We construct a Hamiltonian which…
Structure of the resonance
Jiong-Jiong Liu, Zhan-Wei Liu, Kan Chen +4
We examine the internal structure of the through an analysis of lattice QCD simulations and experimental data within Hamiltonian effective field theory. Two scenarios are…
Strange magnetic form factor of nucleon in heavy baryon chiral effective approach at next to leading order
P. Wang, D. B. Leinweber, A. W. Thomas
The strange magnetic form factor of the nucleon is studied in the heavy baryon chiral effective approach at next to leading order. The one loop contributions from kaon and intermed…
Strange magnetic form factor of the proton at GeV
P. Wang, D. B. Leinweber, A. W. Thomas +1
We determine the and quark contributions to the proton magnetic form factor at finite momentum transfer by applying chiral corrections to quenched lattice data. Heavy baryo…
Simple Quark Model with Chiral Phenomenology
I. C. Cloet, D. B. Leinweber, A. W. Thomas
We propose a new approach to the determination of hadronic observables in which the essential features of chiral symmetry are combined with conventional constituent quark models. T…
QCD Equalities for Baryon Current Matrix Elements
Derek B. Leinweber
An examination of the symmetries manifest in the QCD path integral for current matrix elements reveals various equalities among the quark sector contributions. QCD equalities among…
Do Quarks Really Form Diquark Clusters in the Nucleon?
Derek B. Leinweber
A gauge invariant method for the investigation of scalar diquark clustering in the nucleon ground state is presented. The method focuses on a comparison of quark distributions in t…